What is the primary function of Anomaly-Based Detection?

The primary function of Anomaly-Based Detection is to compare observed events against normal behavior. This method focuses on identifying deviations from established patterns or baselines within a system's operational activities. By establishing what is considered 'normal' behavior, the system can effectively highlight unusual activities that may indicate security threats, such as intrusions or other types of malicious actions. This approach is particularly valuable in environments where threats can be novel or not previously recognized, allowing for the detection of new types of attacks that signature-based methods might miss.

Other options, while relevant to cybersecurity, do not encapsulate the core functionality of anomaly-based detection. For instance, filtering user connections in real-time pertains more to access control mechanisms rather than behavior assessment. Implementing encryption protocols is unrelated to detecting behavior anomalies, as encryption primarily focuses on securing data in transit or at rest. Lastly, describing it as a stand-alone software package does not align with its operational function; rather, Anomaly-Based Detection is often integrated into broader security systems to enhance overall detection capabilities.